OK. I know why. Because in target Activity, I set tvDesc.setText(Html.fromHtml(desc)); with desc is the content of a long web page with HTML tag. Process HTML page with may not-supported tag make my Activity slowly display!
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anticafeMay 14 '11 at 17:51

You could put the processing in a separate thread.
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olafureMay 14 '11 at 19:28

@Olafure: that's a really good idea. Now it works well.
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anticafeMay 15 '11 at 3:35

@olafure can you give me an example. Lets say we have for loop, and we need to run it on onCreate. how can we do this in a different thread ?
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alicanbaturApr 15 '14 at 6:38